Garbage cutting and flushing device



July 27, 1948. A. BJORKLUND GARBAGE CUTTING AND` FLUSHING DEVIQE 3 Sheets-Sheet 1 Filed July 14, 1945 July 27, 1948. Y A. BJoRKLuND 2,445,073

GARBAGE CUTTING AND FLUSHING DEVICE' Filed .July 14, 1945 s sheets-sheet 2 731/ 21;: XIVe/v2@ July 27, 1948. A. BJORKLUND .2,446,073 4 GARBAGE CUTTING AND FLUSHING DEVICE File@ July 14, 1945 y W 3 Sheets-Sheet 5 W W l Patented July 27, 1948 UNITED STATES PATENT OFFICE GARBAGE CUTTING ND FLUSHING DEVICE Arvid Bjorklund, Minneapolis, Minn. f Application .luly 14. 1945. Serial No. 605.104

9 Claims. (Cl. 14S- 184) My present invention relates to improvements in garbage cutting and flushing devices and is inv the nature of an improvement in my pending application of the same title filed September 4, 1944, under Serial No. 552,706.

To the above end, the invention consists of i the nove1 devices and combination of devices partly in section taken on the line 2--2 of Fig. l;

Fig. 3 is a view partly in elevation and partly in transverse section taken on the line 3--3 of Fig. 2; l

Fig. 4 is a `fragmentary view of the housing in longitudinal central vertical section;

Fig. 5 is a detail View partly in end elevation and partly in transverse section taken on the.

line 5-5 of Fig. 2;

Fig. 6 is a transverse section taken on the line 6 6 ofFig. 2;

Fig. 7 is a fragmentary view in longitudinal section taken on the irregular line I--l of Fig. 6; and

' Fig. 8 is a fragmentary view corresponding to 2 l the water conduit section I2'. 'I'he interior of this elbow I9 aiords a flushing chamber 20. In

hereinafter described and dened in the claims.

the bottom of the compartment I I is :a port 2| that connects the discharge end portion of said compartment with the nushing chamber 20. A waste pipe 22, attached to the elbow' I9. leads to anyl suitable source of disposal.

Mounted in the compartmentl I-I is a conical rotor 23 having on lts small or inner end a long trunnion 24 that extends through a hole in the head I5 and is journaled in a bearing 25 in the head I6. A packing 26 in the head It forms a watertight joint between the chamber l0 and the compartment II. On the small `or outer end of' the rotor 23 is a short trunnion 2i journaled in al bearing 28 in the head I1.,' The rotor 23 and its trunnions 24 and 21 are all in axial alignment with the longitudinal axis of the rotor compart ment II. Adjusting screws 29 in the heads I@ 'and II, have conical ends that extend into like seats in the ends of the trunnions 24 and El and hold the rotor 23 against end thrusts.

The rotor 23 is driven from an electric motor` 30 by connections that include an intermeshlng Fig. e.,v but showing the opposite side of the housing.

The numeral 9 indicates a housing having therein a gear chamber ID, a long horizontally disposed conical rotor compartment II, and a water conduit comprising an intake section I2 and a discharge section I2', that extends under the chamber I0 and the compartment II substantially the full length of the housing 9.

A transverse partition I3, between the chamber I0 and the compartment Il, has therein al large central opening I4 normally closed by a displaceable head I5. Both ends of the housing 9 are open and normally closed by displaceable heads i6 and I'I. By removing the heads I6 and I'I, access may be had to the interiors of the chamber I0 and the compartment l I, respectively. l

' 'A hopper I8 on top oi the housing 9 and integral therewith is arranged to discharge garbage fed therein into the compartment II at its receiving or inner end portion. An elbow I9 under the bottom of the outer end portion of the compartment I I and formed as a part of the housing 9 turns downwardly and forms a continuation of worm 3i and worm gear 32 in the chamber Ill. Said worm 3i is carried. on a short shaft 33 journaled in the chamber I0 and driven bythe armature shaft of the motor 30. The worm gear 32 is carried on the long trunnion dt. ibase 3d for the motor 3U also affords a support for the housing 9.

On the periphery of the rotor 23 are two spiral blades 35 and at that are ground to sharp edges. These two blades 35 and 3b aord a continuous spiral feedchannel 3l. The blade tti is on the inner or small end portion of the rotor 23 directly below the hopper I8 and is relatively coarse.

The blade 36. which forms a continuation of the blade 35, is on the other or large end portion of the rotor 23 and is relatively line. The distance between the convolutions ofthe blade '3B progressively decreases from the blade 35 to the outer end of the rotor 23. A transversepassageway in the blade 3-5 is formed by transverse notches 3b, therein. These notches da, relative to the direction of rotation of the rotor 23, are

hook-shaped and produce a cutting and tearing `action on the garbage.

Formed with the rotor 23 is a pair of diamet- Formed on the inner wall of the compartment l! are two series of circumierentially spaced longitudinally oblique shearing blades 40 and 4I. The shearing bladesA40 are directly opposite the blade 35 and the shearing blades 4| are directly opposite the blades 38. The distance between the shearing blades 40 is relatively wide while the distance between the shearing blades 4I is relatively narrow.

In the inner wall of the compartment Il, betweenl the shearing blades 40 and 4I, is an annular channel 42. A second annular channel 43 in the inner wall of the compartment II extends transversely through the shearing blades 4| at their longitudinal centers. By reference to Fig. 4, it will be noted that the shearing blades 4I terminate at the port 2| and" thus leave an annular passageway or discharge chamber 44 in the inner wall of the compartment I I.,.between the outer ends o1' the shearing blades 4| and the outer end of said compartment. The port 2| is at the bottom of the passageway 44.

Formed. in the side Walls of the compartment II at the top'thereof are two short channels 45 that extend through certain of the shearing blades 40 and lead from the hopper I8 to the channel 42. Two circumferentially extended channels 46, in the'side walls of the compartment II, extend transversely through certain of the shearing blades 40 and lead from the channel 43. just below the lower ends of the channels ,45, to a port 41 in the bottom of the compartment II at its inner end portion. This port '41 is closed by a screen 48.

A-plurality of short knives 49 are, attached to the housing 9 by screw-threads and project radially from the side wall of the compartment II on the downwardly moving side of the rotor 23. These knives 49 are spaced apart longitudinally of the compartment I|`directly below the hopper .I8 and extend into the section of the feed channel 31 formed by the blade 35. The knives 49 are positioned with their cutting edges uppermost.

A pair of pins 50 having screw-threaded engagement with the rotor 23 project radially into the channels 42 and 43. The ends ofthe pins 50 are cut square to produce va cutting and tearing action. On the outer end of the rotor 23 is a stirring pin 5I that prevents garbage from clogging the discharge space between the outer ends of the head I1 and the rotor 23.

Water is delivered into the water conduit section I2 through ,a bossed opening 52 in the respective end of the housing 9 from a pipe 53 attached to said housing by screw-threads and leading,r from any suitable source of supply under pressure. The water conduit section I2, under the bottom of the gear chamber I0 first curves downwardly from the inlet opening 52. then upwardly and tangentially to the port 41. A port 54 connects' the conduit section I2, at its delivery end, to the conduit section I2 at its intake end. This 'port 54 is spaced materially above the 'bot tom of the water conduit section I2'.

A branch water pipe 55 leads from the water` pipe 53 and its discharge end portion has threaded engagement with the housing 9, at an opening 56, that leads into the channel 42 at the lower end of the respective channel 45. y

A valve 51 interposed in the pipe 53 and to which the branch pipe 55 is 'attached will be of a type to permit water to flow to either the water conduit section I2 or through the branch pipe 55 or both. On the inner end of the rotor 23 is a disk-like head 58 that prevents garbage from ac- 4 cumulating between the partition I3, head I5 and the respective end of therotor 23.

Operation The operation of the above described'garbage cutting vand ilushing device may be briefly described as follows: Garbage placed in the hopper I8 will be precipitated onto the blade 35 and into the conveying or feed channel 31. 'I'his garbage is iirst acted upon by the rotating cutting blade 35 and the co-operating stationary shearing blades 40 and coarsely cut. During this operation, the blade 35, or the hook-like notches 38 thereon tear the mass of garbage apart and further disintegrate the same. Bones or other objects lodged on the knives 49 will be engaged by blade 35 at its hook-like notches 38 and broken into relatively small parts. The relatively short radiusof the coarse blade 35 produces powerful cutting and crushing action on the coarse garbage, bones, etc., as the same is fed thereto from the hopper I8.

From the blade 35 the garbage being conveyed in the channel 31 is fed to the rotating cutting blade 36 and the cooperating stationary shearing blades 4I-and progressively cut hner as it is conveyed to the passageway chamber 44. Thepins 50 rake and cut corn silk and other materials between the rotor 23 and the shearing blades 4|.

i During the operation of the device, Water in the conduit section I2 is discharged in part through the port 41, into the compartment and reduces the garbage being cut to a. fluid condition. The residue of water in the conduit section I2, which is the major portion thereofris discharged through the port 54 and into the inclined conduit section I 2 where the same flows to the flushing chamber 20, and ushes the disintegrated garbage precipitated from the pas- The channels 42, 43, 4s and 4s facilitate the p' ilow of water and fluid garbage to the compartment II and the commingling of the water and garbage. In case more water is discharged into the compartment II through the port 41 than will escape past the rotor 23 to the chamber 44, said water will back up in the compartment II and flow through the channels 45 and 46 to the port 41 where the same will escape into theconduit section I2' through the port 54. The screen 48 prevents garbage, bones, etc. from escaping through the port 41 into the water conduit section I2' and be conveyed to the waste pipe 22 where the same is liable to clog said pipe.

Due to the conical form of the compartment II and the rotor 23, the blades 35 and 36 may be sharpened and the rotor 23 axially adjusted in the compartment II to compensate for the cut made thereon.

After the garbage is disposed of, the device, while still operating, may be cleansed by operating the valve 51 for the flow of water through the branch pipe 55 and into the compartment II where the water is splashed by the rotor in all directions.

The drawings illustrate a commercial form of the invention, but it will be understood that the same is capable of certain modifications as to details of construction, arrangement and combination of parts within the scope of the inventionA walls disposed axially of said compartment, a rotor in said compartment provided with a spiral cutting blade cooperating with said compartment shearing blades, a feed hopper in 'communication with the compartment at a point adjacent one end of the rotor, the other end of the rotor terminating at a spaced distance from the other end of said compartment to form a discharge chamber in said compartment end, a water conduit in communication with the rotor compartment at a point beneath the feed hopper, a continuation of said water conduit extending 'to a point beneath the compartment discharge chamber, the compartment discharge chamber provided with a discharge port opening into the said conduit continuation, the conduit continuation being provided with a discharge end, means for supplying water to the conduit, and means for rotating the rotor.

2. A structure as defined in claim 1 wherein,

an annular channel is formed in the wall of the y rotor compartment transversely -through the shearing blades` thereon, those shearing blades beneath the feed hopper being cut away obliquely to form a passageway extending from the said annular channel to the feed hopper, and a second obliquely formed passageway extending between said annular channel and the juncture of the water conduit with the compartment.

3. A structure as defined in claim 1 wherein,

`an annular channel is formed in thewall of the rotor compartment transversely throughl the shearing blades thereon, those shearing blades bef neath the feed hopper being cut away obliquely to form a passageway extending from the said annular channel to the feed hopper, a second obliquely formed passageway extending between said annular channel and the juncture of the water conduit with the compartment, and a plurality of pins carried by the rotor to travel in said annular channel.

4. A structure as defined in claim 1 wherein, an annular channel is formed in the wall of the rotor compartment transversely through the shearing blades thereon, those shearing blades beneath the feed hopper being cut away obliquely to form a passageway extending from the said annular channel to the feed hopper, a second obliquely formed passageway extending between said annular channel and the juncture of the water conduit with the compartment, a plurality of pins carried by the rotor to travel in said an-v nular channel, and second water supply means for supplying flushing water directly into said annular channel.

, 5. A-structure as deflned in claim-1 wherein, that portion of the rotor beneath the feed hopper is provided with a plurality of hook-like notches formed transversely through the spiral cutting blades thereof, that portion of the wall of the rotor compartment beneath the feed hopper being provided with a plurality of knives having cutting edges. said knives being so spaced longitudinally direction of rotation of the rotor, and the hooklike notches having their open sides facing in the direction ofrotation of the rotor.

6. A structure as dened in claim 1 wherein, a stirring pin is secured to the discharge end of the rotor for rotation therewith in the discharge chamber of the compartment. i

'1. A structure as defined in claim 1 wherein, a screen covering isprovided for the water conduit at its juncture with the rotor compartment, and a stirring pin is secured to the discharge end of the rotor for rotation therewith in the discharge chamber of the compartment.

8. In a device of the characterdescribed consisting of a housing having a rotor compartment provided with interior shearing blades, a rotor in said compartment having a spiral .cutting blade cooperating with the shearing blades, a feed hopper communicating with the compartment at one end of the rotor, a discharge outlet at the other end ofthe rotor, a means for supplying flushing water to the rotor compartment comprising, an upwardly and rearwardly inclined water conduit communicating with the rotor compartment at a` point beneath the feed hopper, an overflow port in said conduit immediately beneath the juncture thereof with said compartment, a continuation of said conduit extendingfrom the overow port to the housingdischarge outlet, and means for supplying water to said water conduit for the purpose described.

9. A structureas dened in claim 8 wherein, an annular channel is formed transversely through the shearing blades ofthe compartment intermediate thelength thereof. and a passageway extending obliquely through the shearing blades pro` viding communication between the annular channel and the said water conduit.

ARYID BJORKLUND. REFERENCES CITED The following references are of record in the file of.this patent:

UNITED STATES' PATENTS Great Britain Feb. 28, 1936 

